Home / 138,922.14-191,701.14-78,498

Finding the Fourth Proportional to 138,922.14, 191,701.14 and 78,498

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Solution

The fourth proportional to 138,922.14, 191,701.14 and 78,498 is: 108,320.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,922.14 : 191,701.14 = 78,498 : x
  2. Step 2: Convert to fraction form
    138,922.14/191,701.14 = 78,498/x
  3. Step 3: Cross multiply
    138,922.14x = 191,701.14 × 78,498
  4. Step 4: Simplify right side
    138,922.14x = 15,048,156,087.72
  5. Step 5: Solve for x
    x = 15,048,156,087.72/138,922.14
  6. Step 6: Final answer
    x = 108,320.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.